For your longest, strongest nails

12 ml / .4 fl oz

4.8

Rated 4.8 out of 5 stars

490 Reviews

$20.00

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Transform nails to be long, strong, and resilient. Two coats of this strengthening treatment featuring innovative, multi-polymer technology create a shield-like barrier that immediately fortifies the nail plate and helps harden over time. Resilience is improved in as little as one week—with a noticeable increase in hardness—and with the infusion of our proprietary Florium Complex, nails get the perfect dose of the hydration and nutrients needed to support healthy nail growth.

Free of phthalates, parabens, silicones, and gluten
Vegan and cruelty-free

For best results use as a treatment: Apply 2 coats to bare nails every other day for the first 2 weeks. Get Strong Nail Hardener should be removed before applying a fresh coat of treatment. During week 3 and 4 apply 2 coats to bare nails every 4-5 days. Repeat process as needed.

As a base coat: Apply one coat to clean nails and follow with your favorite lakur shade.

Ethyl Acetate, Butyl Acetate, Alcohol Denat., Nitrocellulose, Acrylates/Hydroxyesters Acrylates Copolymer, Isopropyl Alcohol, Acetyl Tribuyl Citrate, Adipic Acid/ Neopenyl Glycol/ Trimellitic Anhydride Copolymer, Dipropylene Glycol Dibenzoate, Etocrylene, Brassica Campestris (Rapeseed) Seed Oil, Brassica Campestris Flower Extract, Chamomilla Recutita (Matricaria) Flowe Extract, Cucumis Sativus (Cucumber) Fruit Extract, Oenothera Biennis (Evening Primrose) Flower Extract, Carthamus Tinctorius (Safflower) Seed Oil, Tocopheryl Acetate (Vitamin E), Dimethicone, CI 42090, CI 60725

$20.00

4.8

Rated 4.8 out of 5 stars

Based on 490 reviews

Total 5 star reviews: 436 Total 4 star reviews: 30 Total 3 star reviews: 7 Total 2 star reviews: 5 Total 1 star reviews: 12

95%would recommend this product

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490 reviews

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CQ
Christine Q.
Verified Buyer
I recommend this product
Pros Performs as Described
Rated 5 out of 5 stars
6 days ago
It's very helpful .
My nails are very weak. so I pick it to make nail hardner. I tried it a few time before I use lakur I put it at first to protect my nails. It worked very well.
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PG
Patti G.
Verified Buyer
I recommend this product
Pros Would Purchase Again, Performs as Described, Exceeds Expectations
Rated 5 out of 5 stars
1 week ago
Better than ever
2 weeks in my nails look great! No breakage, growing...I love this product! Customer for life...
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E
Elizabeth Lindsey E.
Verified Buyer
I recommend this product
Pros Smells Great, Would Purchase Again, Exceeds Expectations, Performs as Described, Gentle
Rated 5 out of 5 stars
1 month ago
Happy Customer!
I’ve been using KUR Strong Nail Hardener for approx 10 days. My nails are definitely stronger which is great news heading in to gardening season!
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N
Nanci
Verified Buyer
I recommend this product
Pros Gentle, Conditions, Exceeds Expectations, Performs as Described, Would Purchase Again
Rated 5 out of 5 stars
1 month ago
One more review singing the praises
I wore acrylics for decades (yes, I AM that old), then wore gels for a few months. Finally wanted to just have bare nails and quit applying those nasty chemicals that were clearly destroying my nails. I’ve now been using this product and all Londontown products for over a year. I will say that this is my go-to base coat. I frequently use this base then follow it with the gel-like base. My nails are now rock hard. They had become thin, fragile, and horribly discolored. It has taken a while to let the discoloring grow out, but I can’t say enough good about this base coat and all the LT products. I confess, I did step away from the Lakur colors for a while and yep, the discoloring started to come back. So I’m sticking to what works. I’m a junkie for metallic colors, so LondonTown, if you’re listening, please make me a metallic true red. Think metallic Ferrari!
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CL
Carole L.
Verified Buyer
I recommend this product
Pros Exceeds Expectations, Would Purchase Again, Performs as Described
Rated 5 out of 5 stars
1 month ago
Nail Hardener
I highly recommend Londontown products. My nails look great and I no longer go to the nail salon!
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